Mono supports a number of platforms, Windows included.
For us, supporting Windows is important because it helps us
debug our code, helps ensure that we are doing things
portably, and is useful to test applications on Mono in
Windows and contrast it with .NET on Windows.

Today on the mono-list someone
mentioned another use of Mono on Windows (as part of a bug
report), which made my day:

It's reasonable to ask why someone should be interested in
running Mono on Windows when the original .NET is available.
My reason is that Mono applications can be run without an
install. .NET requires a lengthy installation (and a reboot
with 1.1 SP) that many administrators (if not users) will not
consider. Mono can be copied on (or even run from a memory
stick).

It is not every day that you run into reasons to run an
open source implementation of a Microsoft standard on a
Microsoft operating system.

Mono on S390x

In the mean time, in another side of the universe Neale
completed the 64 bit port of Mono to the S390x. It is part of
Mono
1.1.13.

Banshee Update

Aaron posted an update on his work
on Banshee, the awesome Mono-based music player that ships
with SUSE Linux.